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Conductivity studies on some alkali metal iodides in aqueous N,N-dimethylformamide solutions at 298.15K

Untersuchungen zur elektrischen Leitfähigkeit einiger Alkalimetalliodide in wäßrigen N,N-Dimethylformamidlösungen bei 298.15K

  • Anorganische Und Physikalische Chemie
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Summary

Conductance measurements for NaI, KI, RbI, and CsI in water/N,N-dimethylformamide mixtures over the whole composition range at 298.15K are reported. The data were analyzed employing theFuoss-Justice equation in terms of limiting molar conductances (Λo),Walden products (Λoη), and association constants (K A). The results indicate that the salts are weakly associated in the above solvent mixture. Variation in theWalden products with solvent composition are briefly discussed. The results were also compared with values reported previously for some alkali metal chlorides and bromides.

Zusammenfassung

Die elektrische Leitfähigkeite von NaI, KI, RbI und CsI wurde in N,N-Dimethylformamid-Wasser-Mischungen verschiedener Zusammensetzung bei 298.15K gemessen. Die erhaltenen Daten wurden analysiert und bezüglich der Grenzäquivalenzleitfähigkeiten (Λo), derWalden-Produkte (Λoη) und der Assoziationskonstanten (K A) ausgewertet. Die Ergebnisse zeigen, daß diese Salze in den verwendeten Lösungsmittelgemischen nur schwach assoziiert sind. Die Änderungen derWalden-Produkte in Abhängigkeit der Lösungsmittelzusammensetzung werden kurz diskutiert. Abschließend werden die Resultate mit Ergebnissen früherer Messungen, in denen das Verhalten von Alkalimetallchloriden und Alkalimetallbromiden untersucht wurde, verglichen.

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Authors and Affiliations

  1. Faculty of Physics and Chemistry, University of Łódź, PL-90236, Łódź, Poland

    A. Szejgis, A. Bald & J. Gregorowicz

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  1. A. Szejgis
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  2. A. Bald
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  3. J. Gregorowicz
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Szejgis, A., Bald, A. & Gregorowicz, J. Conductivity studies on some alkali metal iodides in aqueous N,N-dimethylformamide solutions at 298.15K. Monatsh Chem 128, 1093–1100 (1997). https://doi.org/10.1007/BF00807559

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  • DOI: https://doi.org/10.1007/BF00807559

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